jQuery $.extend - to extend an Array

Question

Using the $.extend is working, but it returns an Object and not a native Array, so the push() won't work.
How can I extend an array, using the jQuery.extend?

var x =[1,2];
var y = $.extend({},x);
y.push(3) // fail

edit: The array WILL contain objects, so - the slice() won't do the trick

@PranavCBalan well, that's what i wrote.. and this is my question — yossi, Nov 07 '16 at 06:49
Possible duplicate of [Is there a method to clone an array in jQuery?](http://stackoverflow.com/questions/3775480/is-there-a-method-to-clone-an-array-in-jquery) — styopdev, Nov 07 '16 at 06:49
jQuery.extend(['c'], ['a','b']) works. Index 0 is overridden as 'a'. And index 1 is assigned 'b'. And the result is an instanceof Array. Although many inbuilt methods are getting added as properties on the resultant array. — Teddy, Oct 24 '18 at 12:42

score 3 · Accepted Answer · answered Nov 07 '16 at 06:52

3

No need of jQuery at all use Array#concat method.

var x =[1,2];
var y = x.concat([3,4]);
y.push(3)

answered Nov 07 '16 at 06:52

Pranav C Balan

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shame on me. you are correct. thanks. (too much of that JQ) – yossi Nov 07 '16 at 06:55
1

@yossi : glad to help you..... if you want to push the value array into an existing array then.... `[].push.apply(x, [1,2,3])` this will push the array values to `x` – Pranav C Balan Nov 07 '16 at 06:57

score 0 · Answer 2 · answered Oct 24 '18 at 12:48

You have to give the input object as an array.

jQuery.extend(['c'], ['a','b'])

Above works as expected. Index 0 is overridden as 'a'. And index 1 is assigned 'b'. And the result is an instanceof Array.

Although, many inbuilt methods are getting added as properties on the resultant array, which might get in the way sometimes.

jQuery $.extend - to extend an Array

2 Answers2